connection refused error from Email Report after upgrading to Latest Superset Version.

I am running Superset with Docker.

I was having issues with making celery worker functional with my Superset Version (circa 2019), so I decided to update to the latest release 0.36.0.

I am using the same versions of geckodriver (0.24.0) and firefox (68.5.0esr) as I was using prior to the update. Python (3.6.9) and Selenium (3.141.0) versions are still the same.

However, when trying to send an email, I am getting the following error:

erset-worker_1  |   "Flask-Caching: CACHE_TYPE is set to null, "
superset-worker_1  | [2020-04-22 15:36:09,452: ERROR/ForkPoolWorker-8] Task email_reports.send[eb4ddfba-0901-427e-be05-743c9c97a2f5] raised unexpected: WebDriverException('connection refused', None, None)
superset-worker_1  | Traceback (most recent call last):
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/celery/app/trace.py", line 385, in trace_task
superset-worker_1  |     R = retval = fun(*args, **kwargs)
superset-worker_1  |   File "/app/superset/app.py", line 114, in __call__
superset-worker_1  |     return task_base.__call__(self, *args, **kwargs)
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/celery/app/trace.py", line 650, in __protected_call__
superset-worker_1  |     return self.run(*args, **kwargs)
superset-worker_1  |   File "/app/superset/tasks/schedules.py", line 373, in schedule_email_report
superset-worker_1  |     deliver_dashboard(schedule)
superset-worker_1  |   File "/app/superset/tasks/schedules.py", line 211, in deliver_dashboard
superset-worker_1  |     driver = create_webdriver()
superset-worker_1  |   File "/app/superset/tasks/schedules.py", line 163, in create_webdriver
superset-worker_1  |     driver = driver_class(**kwargs)
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
superset-worker_1  |     keep_alive=True)
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
superset-worker_1  |     self.start_session(capabilities, browser_profile)
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
superset-worker_1  |     response = self.execute(Command.NEW_SESSION, parameters)
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
superset-worker_1  |     self.error_handler.check_response(response)
superset-worker_1  |   File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
superset-worker_1  |     raise exception_class(message, screen, stacktrace)
superset-worker_1  | selenium.common.exceptions.WebDriverException: Message: connection refused

‘geckodriver.log’:

1587569769443	mozrunner::runner	DEBUG	Killing process 104
1587569769447	webdriver::server	DEBUG	<- 500 Internal Server Error {"value":{"error":"unknown error","message":"connection refused","stacktrace":""}}

Why is this error occurring? What change in Superset is affecting the Email Report feature?

All package versions:

• geckodriver – 0.24.0
• python – 3.6.9
• firefox – 68.5.0esr
• selenium – 3.141.0

[avicenteg]

@poppyc0ck thanks, finally my error was a similar one. My Docker container didn’t use the ip: 0.0.0.0, I changed it by superset-app (the name of the container) and using the 8088 port, and now it is running perfectly.

[Shkurupii]

Hello @avicenteg @poppyc0ck ! Your advice will be very appreciated.

# The base URL to query for accessing the user interface
WEBDRIVER_BASEURL = "http://0.0.0.0:8088/"

In my case superset and celery don’t bound to 8088. What’s the service stands behind 8088 in your case? I can’t figure out myself.

Thanks!